“It’s certainly disappointing,” Ward 7 Coun. Tony Caterina said Wednesday. He said he was glad the problem was discovered before the pool opened.

Edmonton’s first natural outdoor pool

When it opens, the pool will be the first of its kind in the city. Unlike a pristine blue swimming pool that relies on chemical filtration and chlorine, natural pools typically have cloudier water and a separate filtration pool nearby.

At Borden Park, the filtering pool is filled with sand, gravel and plankton. The filtering pool is beside the new swimming pool.

The pool’s water looks murky because it relies on a natural filtration system. (Peter Evans/CBC)